This document introduces tools and methodologies for simulating light scattering in the Advanced Systems Analysis Program (ASAP®) from Breault Research Organization (BRO). It is a comprehensive guide to command usage, rather than an exhaustive treatise on scatter theory. A list of references is provided for those interested in the fundamental physical concepts of light scattering.
The first section of this document, "Scatter Terminology", introduces concepts and terminology essential to the treatment of scatter. ASAP scatter models are cataloged in the second section, "Types of Scatter Models." The third section, "Scatter Methods", discusses the supplementary ASAP commands that control the implementation of scatter models. Examples are included throughout to demonstrate command syntax. The last section, "BSDF Fit Utility", introduces the ASAP utility for creating Harvey and polynomial scatter models.
This document, formerly know as a BRO Technical Guide, is now part of a larger group of documents known as "BRO documentation". All "Technical Guides" are now "BRO Documentation."
Summary of changes
Further corrections to PARTICLES Example 1 were made. (Mar 23, 2012)
Two new isotropic scatter models were added: K-Correlation, which is used to simulate scatter from smooth surfaces, and ABg, which is used to define BSDF. (Mar 2012)
PARTICLES Example 1 was modified for clarity. (Feb 12, 2010)
Equations for Polynomial, Trinomial, and Binomial were revised, and include separate expressions for m>0 and m<0. (Oct 13, 2009)
An example script error on page 29 and a figure cross-reference on page 15 were corrected (Jul 7, 2009).
Equations for the total integrated scatter (TIS) of the modified Harvey command on page 18 were corrected. No other changes were made to the technical content. (Mar 12, 2009)